chemical engineering MCQs – Page 237

Practise multiple-choice questions from chemical engineering for competitive examinations and subject revision. Review each marked answer and report any item that may be outdated or unclear.

chemical engineering Mcqs

4721. Which of the following is not a variable area flow meter ?
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A. Magnetic flow meter

B. Piston type meter

C. Orifice and tapered plug meter

D. Rotameter

4722. Which of the following is not a unit of pressure ?
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A. Torr

B. m2

C. Parsec

D. Ata, bar or Pascal

4723. Thermal conductivity measurement is used for the determination of________________?
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A. Specific gravity of petrofuels

B. O2 percentage in the flue gas

C. CO2 percentage in the flue gas

D. Composition of an alloy

4724. Which of the following is not the triple point of water ?
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A. 273K

B. 32F

C. 32R

D. 492R

4725. The frequency response of a first order system, has a phase shift with lower and upper bounds given by________________?
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A. -?/2, 0

B. ?, ?/2

C. 0, ?/2

D. -?/2, ?/2

4726. Emf developed by a thermocouple while measuring a temperature of 400C is 22 mV. The type of thermocouple used is ___________________?
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A. Platinum-platinum + rhodium

B. Iron-constantan

C. Chromel-alumel

D. Platinum-rhodium

4727. Configuration of Bourdon spring tube is never made of _____________ shape?
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A. Helical

B. Spiral

C. Circular

D. Semi-circular

4728. Which of the following thermocouples is the most suitable for measuring a temperature of about 1600C in an oxidizing atmosphere ?
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A. Iron-constantan

B. Chromel-alumel

C. Copper-constantan

D. Platinum-platinum + rhodium

4729. Gas chromatography is used for the measurement of ________________?
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A. Pressure

B. Concentration

C. Temperature

D. Flow rate

4730. If the absolute temperature of an ideal gas is tripled and simultaneously the pressure is reduced to one third; then the volume of gas will _______________?
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A. Increase nine fold

B. Increase three fold

C. Remain unaltered

D. Decrease three fold

4731. Isotonic solutions must have the same__________________?
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A. Molar concentration

B. Normality

C. Critical temperature

D. Viscosity

4732. The weight fraction of methanol in an aqueous solution is 0.64. The mole fraction of methanol XM satisfies________________?
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A. 0.5 < XM < 0.64

B. XM < 0.5

C. XM ? 0.64

D. XM = 0.5

4733. Emf developed by a thermocouple, while measuring a temperature of 600C is about 5.5 mV. The type of thermocouple used is_______________?
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A. Chromel-alumel

B. Platinum-platinum + rhodium

C. Either A., B. or C.

D. Iron-constantan

4734. Which of the following thermocouples will give the highest output for the same value of hot and cold junction temperature ?
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A. All will give the same output

B. Chromel-constantan

C. Iron-constantan

D. Platinum-platinum + rhodium

4735. Which of the following is not a second order instrument ?
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A. Mercury in glass thermometer with covering

B. Pressure gauge with one bellow, two tubes and a tank

C. None of these

D. Bare mercury in glass thermometer

4736. Bode diagram are generated from output response of the system subjected to which of the following input ?
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A. Ramp

B. Step

C. Sinusoidal

D. Impulse

4737. Which of following error integral is considered as the best criterion in controller settings ?
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A. ?0 ? |e| dt

B. None of these

C. ?0 ? |e2| dt

D. ?0 ? e2 dt

4738. What is the Laplace transform of impulse input having magnitude X? ?
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A. X

B. 1

C. X2

D. 1/X

4739. For a given mass of a gas at constant temperature, if the volume V becomes three times, then the pressure P will become______________?
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A. 3P

B. 9P2

C. P/3

D. 9P

4740. The transfer function of a second order system is _____________________?
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A. 1/(T2s2 + 2?Ts + 1)

B. 1/(T2s2 + 2Ts + 1)

C. 1/(T2s2 + 2?T + 1)

D. None of these

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